Meshworthy
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Free browser tools

Free 3D print tools. Know before you print.

Focused 3D print checks with evidence you can act on. Every tool runs on your device. There is no account, file upload, or opaque score.

Private by designNamed evidenceFree to use

Available now

Small, purposeful tools for decisions that matter before slicing.

  • Color & structure

    3MF Color Inspector

    Inspect a 3MF's objects, colors, materials, textures, transforms, and reference integrity privately in your browser. Generate a standards compliant reference file and compare a color round trip to see what an application preserved, changed, or lost.

    Accepts 3MFGenerates Reference 3MFRuns locally · No upload
    Open the 3MF Color Inspector

  • Mesh & topology

    STL Error Checker

    Check an STL for boundary edges, non-manifold edges, orientation problems, degenerate and duplicate faces, and separate shells privately in your browser. Confirmed topology errors and review-only risks are always kept apart, with an interactive overlay and a copyable local report.

    Accepts STLGenerates Local reportRuns locally · No upload
    Open the STL Error Checker

  • Fit & tolerance

    3D Print Clearance Test

    Generate a six-position FDM or resin test for round pins, square keys, dovetails, or magnet pockets entirely in your browser. Download validated STL and 3MF artifacts, then record the fit that belongs to your exact printer, material, profile, and connector geometry.

    Accepts SettingsGenerates STL + 3MFRuns locally · No upload
    Open the 3D Print Clearance Test

Which tool for which problem.

Start from what you are seeing, then open the tool that reports it with evidence.

  • The slicer reports holes, non-manifold edges, or an inside-out model. Run the STL Error Checker. It separates confirmed topology errors from review-only risks.
  • Colors or materials changed after editing a 3MF. Open the 3MF Color Inspector. It lists what the package contains and compares a round trip against a reference file.
  • Printed pins, keys, or magnets do not fit. Generate a clearance test. It gives six ascending clearances to print and compare on your own printer.

How the tools work.

Every tool runs in a Web Worker on your device, so a large file does not freeze the page and nothing is sent anywhere. Results come with named evidence, such as the edge or resource that triggered a finding, instead of a single score. Each tool page explains what it checks and where its limits are.

When you need to change the model, not just inspect it, read the matching guide or see the Meshworthy workflows for the Mac app. Need files to test with? The STL test files are CC0 and each has a checksum and an expected result.

Questions about the free tools.

Do the tools upload my model?

No. Each tool reads your file inside a Web Worker in your browser. The model, its filename, and its coordinates never leave your device, and the tools make no network request that carries your file.

Do I need an account?

No. There is no sign-in and no email gate.

Does a passing result mean my model will print?

No. The checks report named evidence about topology, 3MF structure, or fit calibration. They cannot prove wall thickness, supports, slicer behavior, or the strength of a printed part.

How are the tools different from the Meshworthy Mac app?

The browser tools are read-only or generate a test file, and each one covers a single task. The Mac app opens STL, OBJ, 3MF, and PLY, lets you inspect findings in 3D, and, with Pro, repairs, splits, and hollows models and verifies the export.